Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges &
Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
Methodology
This study was carried out in adopted villages of Krishi Vigyan Kendra (KVK) Supaul under
NICRA project during kharif season in different year. The demonstrations on stress tolerant
paddy variety Sahbhagi dhan were conducted in three different adopted villages i.e.
Sadanandpur, Bishanpur and Besa of Supaul district in Bihar over the period. The Supaul
district is situated adjust to Koshi river and the river flows across the district. This particular
variety was chosen for demonstration because of suitability of soil and climatic condition. The
performance of Sahbhagi dhan were compared with local variety known as Butraj. All the
participating farmers were trained on various aspects of rice production technologies and
recommended agronomic practices. The soil of demonstration site was slightly acidic in nature
(pH-5.5 to 6.5) with sandy loam in texture. The normal annual rainfall of the district was 1344
mm and more than 85% of it was received during rainy season. In year 2018-19 two dry spell
of one week in the month of June and one dry spell of one week in the month of July and
August each were observed. Whereas in year 2019-20, June months was almost dry and one
week dry spell in July month was also observed. It is clearly visible that the most of the
precipitation has been occurred during the rainy season from June to September during south
west monsoon.
Results
The demonstrated paddy variety Sahbhagi dhan has shown stress tolerance capacity up to 10-
15 days which is more than the local variety Bhutraj. The maximum yield obtained of Shabhagi
was 34.0 q/ha in transplanted field where as the local variety maximum yield was less as 27.0
q/ha. It has been observed that there is an increase in yield of 25 to 30 % during the study
period.
Yield performance and percentage yield increase
Crop Year Demo
Variety
Demo yield
(Q/ha)
Check
Variety
Check
(Q/ha)
% increase
Paddy 2016 Sahbhagi 34 Bhutraj 27 25.93
Paddy 2017 Sahbhagi 32 Bhutraj 26 23.08
Paddy 2018 Sahbhagi 34 Bhutraj 26 30.77
Due the drought resistance performance of Sahbhagi dhan, the farmers are assured about yield.
During the Kharif season of year 2018 there was two dry spell of one week in the month of
June and one dry spell of one week in the month of July but Sahbhagi dhan performed well and
maintained the yield. However, in year 2017 slightly less yield were observed because of
submergence and loss of crop due to high precipitation in the month of July and August. In
above table the highest yield increase of 30 % observed in year 2018. Whereas minimum yield
369 | Page Managing genetic resources for enhanced stress tolerance